JP5043697B2 - Circuit breaker - Google Patents

Description

  The present invention relates to a circuit breaker, and more particularly to a circuit breaker used in a DC power distribution system.

  There exist some which are described in patent document 1 as a conventional circuit breaker. As shown in FIGS. 4 to 6, this circuit breaker includes two pieces arranged in parallel in the short width direction of the container body 1 in the container body 1 formed in a flat box shape by an insulating synthetic resin material. The fixed contacts 2A and 2B, the two movable contacts 4A and 4B, which are fixed to the fixed contacts 2A and 2B, which are opposed to the fixed contacts 2A and 2B so as to freely contact (separate and separate), and the two movable contacts And an opening / closing mechanism 5 for driving the contacts 4A, 4B. The movable contacts 3A, 3B are brought into contact (introduced) and separated from the fixed contacts 2A, 2B via the opening / closing mechanism 5 by rotating the handle 6. Open).

  The opening / closing mechanism 5 that opens and closes the movable contacts 4A and 4B includes a first pulling member that includes an operating plate 43 that is a latch member, a cross bar 40, and a stepped locking portion 57 that locks one end of the operating plate 43. It consists of a release plate 41, a second trip plate 42, a handle 6, a U-shaped link 44 and the like. In addition, a thermal tripping device composed of two bimetals (not shown) that releases the switching mechanism 5 when an overcurrent is detected, and an electromagnetically driven tripping mechanism that releases the switching mechanism 5 when a short-circuit current flows. A removing device (not shown) is housed in the container 1.

  The handle 6 includes an operation portion 6a, a rotation portion 6b, and a handle shaft 6c. A handle shaft 6c protruding from the center of both side surfaces of the rotation portion 6b is provided in a shaft hole (not shown) provided in the body 1. ) And is rotatably held by the container body 1, and the operation portion 6 a protrudes from the front surface of the container body 1. Further, a torsion spring (not shown) is mounted on the handle shaft 6c, and the handle 6 is urged by the torsion spring in the operating direction (rotation direction) to the open position at the closing position.

  An upper shaft 44 a of the link 44 is rotatably inserted into a shaft hole 52 provided at the lower end of the rotating portion 6 b and is connected to the operation plate 43 via the link 44.

  The actuating plate 43 is connected to the handle 6 via the link 44 by inserting the lower shaft 44b of the link 44 into bearing holes 43a provided on both sides of the center, and is disposed in the body 1 so as to be movable up and down.

  The cross bar 40 is pivotally supported by inserting shafts 40a projecting on both side surfaces of the upper portion into shaft holes 52, 52 formed in the body 1, and rotating about the shaft 40a as a fulcrum, thereby moving the movable contact 4A, 4B is driven. The lower end of the cross bar 40 is pushed by a coil spring 62 that is compressed between the lower end and a wall 63 suspended from the bottom of the vessel 1 so that the movable contacts 3A and 3B are fixed contacts. The rotational force in the direction of driving the movable contacts 4A and 4B is urged away from 2A and 2B.

  FIG. 5 shows an open state. In this open state, the operation portion 6a of the handle 6 is in an inverted state exposed from the front surface of the body 1, and the engagement state between one end of the operating plate 43 and the first tripping plate 41 is shown. Is in a disconnected state. The crossbar 40 is urged by the coil spring 62 to rotate clockwise in the figure, and the movable contacts 4A and 4B held by the crossbar 40 move their free ends upward. The movable contacts 3A and 3B provided at the respective free ends are separated from the corresponding fixed contacts 2A and 2B (open state).

  In this state, when the operation portion 6a of the handle 6 is rotated clockwise, the upper shaft 44a of the link 44 is pushed downward, and the link 44 pushes down the operating plate 43 by the lower shaft 44b. By pushing down the operating plate 43, one end (right end in the figure) of the operating plate 43 hits the locking portion 57 of the first tripping plate 41, and the operating plate 43 rotates counterclockwise with the position as the rotation center. The other end (left end) of the operating plate 43 hits the protrusion 84 provided at the upper end of the cross bar 40, and rotates the cross bar 40 counterclockwise against the spring bias.

  By this rotation, the movable contacts 4A and 4B held by the cross bar 40 are rotated counterclockwise to bring the free-end movable contacts 3A and 3B into contact with the fixed contacts 2A and 2B, respectively.

  When the handle 6 is further rotated clockwise, the upper shaft 44a moves to the left from the line connecting the position of the lower shaft 44b of the link 44 and the center of rotation of the handle 6. In this state, the torsion spring of the handle 6 is moved. The coil spring 62 that urges the cross bar 44 and the spring force of the movable contact 4B are balanced, and the latched state between the one end of the operating plate 43 and the engaging portion 57 of the first tripping plate 41 is maintained. The charged state is maintained (see FIG. 6).

  Now, when the operation portion 6a of the handle 6 is rotated counterclockwise in the inserted state, the position of the upper shaft 44a of the link 44 is moved upward to the right across the line connecting the rotation center of the handle 6 and the lower shaft 44b. Therefore, the latched state of the left end of the operating plate 43 and the engaging portion 57 of the first tripping plate 41 is released, and the crossbar 40 is rotated clockwise by the biasing force of the coil spring 62 and the handle 6 However, it quickly returns to the open position by the biasing force of the torsion spring. When the cross bar 40 is rotated clockwise, the movable contacts 4A and 4B are rotated clockwise and the free ends are moved upward to separate (open) the movable contacts 3A and 3B from the fixed contacts 2A and 2B. . The description of the tripping operation is omitted.

Conventional circuit breakers configured as described above are generally used for applications that block AC, but most of the configuration can be diverted to circuit breakers for blocking DC. The production cost of the DC circuit breaker can be greatly reduced by using the same configuration as that of the circuit breaker.
JP 2001-307611 A

  By the way, when DC is interrupted, there is no zero cross point in the voltage (DC voltage) unlike when AC is interrupted, so in a DC circuit breaker, how quickly the arc generated during the opening operation of the main contact is accelerated. Whether to extinguish the arc is a particularly important issue. However, in the circuit breaker described in Patent Document 1, when the handle 6 is turned to manually open the main contacts (fixed contacts 2A, 2B and movable contacts 3A, 3B), the opening / closing mechanism 5 is pulled. Since the handle 6 is not released by the releasing device, the operating force of the handle 6 is large, and the operating portion 6a of the handle 6 must be picked and operated by the fingertip. It was difficult.

  The present invention has been made in view of the above circumstances, and an object of the present invention is to provide a circuit breaker that can quickly open a main contact manually while adopting many configurations common to AC circuit breakers. It is in.

In order to achieve the above object, the invention of claim 1 is provided in a primary side terminal to which a DC voltage is applied, a secondary side terminal connected to a load, and an electric circuit connecting the primary side terminal and the secondary side terminal. Main contact, an opening / closing mechanism for opening / closing the main contact, a tripping means for releasing the opening / closing mechanism to open the main contact when an overcurrent flows in the electric circuit, and one end side formed in a box shape by an insulating material A primary terminal and a secondary terminal on the other end, a main contact, an opening / closing mechanism, a container housing the tripping means inside, an input position where the main contact is turned on by the opening / closing mechanism, and a main terminal Converts the pivoting movement of the handle that is pivotable with respect to the container between the open position that opens the contact and the handle protruding from the flat front surface of the container into a sliding movement that is substantially parallel to the front surface. and a converting means for, handle, turned Does not protrude from the front surface of the device body at location, and except in loading position has a handle operation portion protruding from the front face of the device body, converting means includes an operation portion that is manually slid, handle operation part handle a large amount of movement than the sliding distance of the operating unit when opening it primarily contacts applying a pressing force possess a pressing portion for rotating the pressing portion is erected in the protruding direction of the handle legs It consists of a piece and a pressing projection that protrudes from the tip of the leg piece and comes into contact with the operating portion of the handle at the closing position. The leg piece is connected to the slidable contact surface of the pressing projection, and the slidable contact surface to which the operating portion of the handle slidably contacts when the handle rotates from the loading position toward the open position. and characterized in that it Yes That.

According to the first aspect of the present invention, the distance that the pressing portion slides with respect to the turning distance of the handle becomes shorter, so that the main contact is opened in a shorter time than when the handle is directly turned. be able to. As a result, the main contacts can be manually opened quickly while adopting many common configurations with conventional AC circuit breakers. In addition, a substantially constant pressing force can be applied to the handle from the pressing portion.

  ADVANTAGE OF THE INVENTION According to this invention, the circuit breaker which can open | release a main contact manually manually can be provided, adopting many structures common with the circuit breaker for alternating current.

  Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. However, since the basic configuration of this embodiment is the same as that of the conventional example (AC circuit breaker) shown in FIGS. 4 to 6, common components are denoted by the same reference numerals and illustrated and described as appropriate. Is omitted.

  As shown in FIG. 2, the container 1 is formed in a flat box shape by an insulating material such as a synthetic resin, and is disposed in the distribution board 110 at one end in the longitudinal direction (the right end in FIG. 2). A pair of primary terminals into which a conductive bar (not shown) is plugged and connected are housed, and the other end in the longitudinal direction (left end in FIG. 2) is supplied with DC power to supply DC power to the load. A pair of secondary side terminals to which the line Wdc is connected are accommodated. As in the conventional example, the primary side terminal is composed of a blade holder that sandwiches the conductive bar in the thickness direction, and the secondary side terminal is composed of a quick connection terminal.

  The circuit breaker of this embodiment is different from the conventional example in that the rotational movement of the handle 6 protruding from the flat front surface (upper surface in FIG. 4) of the container body 1 in the conventional example is a sliding motion substantially parallel to the front surface. It is provided with the conversion means to convert into. This conversion means opens at least the main contacts (fixed contacts 2A and 2B and movable contacts 3A and 3B) by applying a pressing force to the operating unit 11 that is manually slid as shown in FIG. 1 and the handle 6. At this time, the pressing portion for rotating the handle 6 with a movement amount larger than the sliding amount of the operation portion 11 is composed of a slide operation member 10 integrally formed as a synthetic resin molded product.

  The slide operation member 10 has a strip-shaped main piece 13 in which leg pieces 14a and 14b are suspended from both ends in the longitudinal direction, and a rectangular plate-like operation portion 11 is a front surface of the main piece 13 (in FIGS. 1 and 2). While projecting forward (upward in FIGS. 1 and 2) from the upper surface), a pressing projection 12 is provided at the tip of the longer leg piece 14a. As shown in FIG. 1, the pressing protrusion 12 has a sliding surface 12 a that is inclined in a direction (upward right in FIG. 1) in which the distance from the handle 6 increases as the distance from the front surface of the container 1 increases. In the present embodiment, the longer leg piece 14a and the pressing protrusion 12 constitute a pressing portion, and, as will be described later, the closing position (the position shown in FIG. 1 (a)) to the open position (FIG. 1 (b)). The sliding contact surface 12a of the pressing projection 12 and the sliding contact surface 14c formed by the inner surface of the leg piece 14a are in sliding contact with the tip of the handle 6 (operating portion 6a) rotating toward the position It has become.

  The container body 1 is provided with a rectangular box-shaped storage portion 20 that projects forward (upward in FIG. 2) so as to surround the handle 6. A rectangular window hole 21 is opened in the front wall of the storage unit 20, and the slide operation member 10 is stored in the storage unit 20 with the operation unit 11 inserted through the window hole 21. A space that allows the slide operation member 10 to slide along the longitudinal direction of the container body 1 is formed in the storage unit 20. Further, locking projections 15 a and 15 b are respectively provided on both sides of the main piece 13 of the slide operation member 10 with the operation portion 11 interposed therebetween, and the locking projections 15 a and 15 b are provided on the inner side of the front wall of the storage portion 20. Locking recesses 22a and 22b that are selectively engaged with 15b are provided, and the slide operation member 10 is fixed to the storage portion 20 by locking the locking protrusions 15a and 15b to the locking recesses 22a and 22b. It is held in the loading position and the release position, respectively. Further, on the front surface of the main piece 13 of the slide operation member 10, a character “ON” is formed at a position facing the window hole 21 in the loading position, and a character “OFF” is disposed at the position facing the window hole 21 in the open position. Is formed, and the on / off state of the main contact is visible (see FIG. 2). The storage unit 20 may be configured as a separate synthetic resin molded product from the container 1 and attached to the container 1, or the container 1 and the storage unit 20 may be configured integrally as a synthetic resin molded product. Also good.

  Next, the operation when the circuit breaker of this embodiment is manually turned on / off will be described.

  First, the making operation will be described. In the open state shown in FIG. 1 (b), when a rightward force is applied to the operation portion 11 protruding from the window hole 21 of the storage portion 20, the locking projection 15b is bent and locked with the locking recess 22b. The slide operation member 10 is slid rightward. At this time, the leg piece 14b of the slide operation member 10 presses the operation portion 6a of the handle 6 in an inverted state exposed from the front surface of the container 1, and the handle 6 rotates clockwise in the figure by this pressing force. In the process of moving the slide operation member 10 to the closing position, the main contacts (fixed contacts 2A, 2B and movable contacts 3A, 3B) are contacted by the opening / closing mechanism 5 interlocked with the handle 6 as described in the prior art. The charging state is established (see FIG. 1 (a)). In addition, in the loading position, the locking projection 15a is locked with the locking recess 22a, whereby the slide operation member 10 is held in the loading position with respect to the storage portion 20.

  On the other hand, when a leftward force is applied to the operation portion 11 protruding from the window hole 21 of the storage portion 20 in the throwing state shown in FIG. 1A, the locking projection 15a is bent to engage with the locking recess 22a. The stop is released and the slide operation member 10 slides to the left. At this time, as the slide operation member 10 slides, the sliding contact surface 12a of the pressing projection 12 and the operating portion 6a of the handle 6 are first slidably contacted, and the operating portion 6a is pressed against the pressing projection 12. Then, the handle 6 starts to rotate counterclockwise in the drawing. As the handle 6 is rotated, the operation portion 6a is separated from the pressing protrusion 12, and subsequently the handle 6 is further rotated counterclockwise by being in sliding contact with the sliding contact surface 14c of the leg piece 14a. Then, in the process of moving the slide operation member 10 to the open position, as described in the prior art, the handle 6 is rapidly rotated back to the open position side by the biasing force of the torsion spring, and the main contact (fixed contact 2A, 2B and the movable contacts 3A, 3B) are opened.

  Here, the distance by which the slide operation member 10 slides is shorter than the rotation distance from the closing position to the position where the handle 6 is rapidly returned by the biasing force of the torsion spring. Accordingly, the main contact can be opened in a shorter time when the slide operation member 10 is slid and operated as compared with the conventional example in which the operation portion 6a of the handle 6 is held with a finger and is rotated. . Therefore, the circuit breaker according to the present embodiment can quickly open the main contact manually while adopting many common configurations with the conventional circuit breaker for alternating current. In addition, the pressing portions (the leg pieces 14a and the pressing protrusions 12) are formed with sliding contact surfaces 12a and 14c that are in sliding contact with the operation portion 6a of the handle 6, and these sliding contact surfaces 12a and 14c are different from each other. Since it is formed, a substantially constant pressing force can be applied to the operation portion 6a.

  By the way, the circuit breaker of this embodiment is used for the DC power distribution system shown in FIG. The system is applied to various houses H such as detached houses and apartment houses. In this house H, a DC power supply unit 101 that outputs DC power and a DC device 102 as a load driven by DC power are provided, and a DC supply line connected to the output end of the DC power supply unit 101 DC power is supplied to the DC device 102 through Wdc. A circuit breaker (hereinafter referred to as “DC breaker”) 114 according to this embodiment is provided between the DC power supply unit 101 and the DC device 102.

  The DC supply line Wdc is used as both a DC power supply path and a communication path, and is connected to the DC supply line Wdc by superimposing a communication signal for transmitting data on a DC voltage using a high-frequency carrier wave. Enables communication between devices. This technique is similar to a power line carrier technique in which a communication signal is superimposed on an AC voltage in a power line that supplies AC power.

  The DC supply line Wdc is connected to the home server 116 via the DC power supply unit 101. The in-home server 116 is a main device for constructing a home communication network (hereinafter referred to as “home network”), and communicates with a subsystem constructed by the DC device 102 in the home network.

  In the example shown in the drawing, as an subsystem, an illumination system comprising an information equipment system K101 comprising an information-system DC device 102 such as a personal computer, a wireless access point, a router, and an IP telephone, and an illumination system DC equipment 102 such as a lighting fixture. K102 and K105, an intercom system K103 including a DC device 102 that handles visitor correspondence and intruder monitoring, and a residential alarm system K104 including a warning DC device 102 such as a fire detector. Each subsystem constitutes a self-supporting distributed system, and can operate even with the subsystem alone.

  The DC breaker 114 described above is provided in association with a subsystem. In the illustrated example, four DC breakers are associated with the information equipment system K101, the lighting system K102 and the intercom system K103, the house alarm system K104, and the lighting system K105. 114 is provided. When a plurality of subsystems are associated with one DC breaker 114, a connection box 121 for dividing the system of the DC supply line Wdc is provided for each subsystem. In the illustrated example, a connection box 121 is provided between the illumination system K102 and the intercom system K103.

  As the information equipment system K101, there is provided an information equipment system K101 composed of a DC equipment 102 connected to a DC outlet 131 arranged in advance in the house H (constructed when the house H is constructed) in the form of a wall outlet or a floor outlet.

  The lighting systems K102 and K105 include a lighting system K102 including a lighting fixture (DC device 102) arranged in advance in the house H, and a lighting fixture (DC device 102) connected to a hook ceiling 132 arranged in advance on the ceiling. An illumination system K105 is provided. At the time of interior construction of the house H, the contractor attaches the lighting fixture to the hook ceiling 132, or the resident himself attaches the lighting fixture.

  In addition to using an infrared remote control device, a control instruction for the lighting apparatus that is the DC device 102 constituting the lighting system K102 can be given using a communication signal from the switch 141 connected to the DC supply line Wdc. That is, the switch 141 has a communication function together with the DC device 102. In addition, a control instruction may be given by a communication signal from another DC device 102 in the home network or the home server 116 regardless of the operation of the switch 141. The instructions to the lighting fixture include lighting, extinguishing, dimming, and blinking lighting.

  Since any DC device 102 can be connected to the DC outlet 131 and the hooking ceiling 132 described above and DC power is output to the connected DC device 102, the DC outlet 131 and the hooking ceiling 132 are distinguished below. When it is not necessary, it is called “DC outlet”.

  These DC outlets have a plug-in connection port into which a contact (not shown) provided directly on the DC device 102 or a contact (not shown) provided via a connection line is inserted into the body. The contact receiver that directly contacts the contact inserted into the connection port is held by the container. That is, the direct current outlet supplies power in a contact manner. When the DC device 102 connected to the DC outlet has a communication function, a communication signal can be transmitted through the DC supply line Wdc. A communication function is provided not only in the DC device 102 but also in the DC outlet.

  The home server 116 not only is connected to the home network, but also has a connection port connected to the wide area network NT that constructs the Internet. When the in-home server 116 is connected to the wide area network NT, it is possible to receive services from the center server 200 that is a computer server connected to the wide area network NT.

  The service provided by the center server 200 includes a service that enables monitoring and control of equipment (including mainly the DC equipment 102 but also other equipment having a communication function) connected to the home network through the wide area network NT. is there. This service makes it possible to monitor and control devices connected to the home network using a communication terminal (not shown) having a browser function such as a personal computer, Internet TV, or mobile phone.

  The in-home server 116 has both functions of communication with the center server 200 connected to the wide area network NT and communication with equipment connected to the home network, and identification information about equipment in the home network ( Here, it is assumed that an IP address is used).

  The home server 116 enables monitoring and control of home devices through the center server 200 from a communication terminal connected to the wide area network NT by using a communication function with the center server 200. The center server 200 mediates between home devices and communication terminals on the wide area network NT.

  When monitoring and controlling home devices from a communication terminal, monitoring and control requests are stored in the center server 200, and the home device periodically performs one-way polling communication to monitor from the communication terminal. And receive control requests. With this operation, it is possible to monitor and control devices in the house from the communication terminal.

  Further, when an event that should be notified to the communication terminal, such as a fire detection, occurs in the home device, the home device notifies the center server 200, and the center server 200 notifies the communication terminal by e-mail.

  An important function among the communication functions with the home network in the home server 116 is the detection and management of the devices constituting the home network. The home server 116 automatically detects devices connected to the home network by applying UPnP (Universal Plug and Play). The home server 116 includes a display device 117 having a browser function, and displays a list of detected devices on the display device 117. The display device 117 has a configuration with a touch panel type or an operation unit, and can perform an operation of selecting desired contents from options displayed on the screen of the display device 117. Therefore, the user (contractor or householder) of the home server 116 can monitor or control the device on the screen of the display device 117. The display device 117 may be provided separately from the home server 116.

  The in-home server 116 manages information related to device connection, and grasps the type, function, and address of the device connected to the home network. Accordingly, the devices in the home network can be operated in conjunction with each other. Information on the connection of the device is automatically detected as described above. In order to operate the device in an interlocking manner, the device itself is automatically associated with the attribute held by the device itself, and the home server 116 is configured as a personal computer. It is also possible to connect various information terminals and use the browser function of the information terminals to associate devices.

  Each device holds the relationship of the interlocking operation of the devices. Therefore, the device can operate in an interlocked manner without passing through the home server 116. By associating the linked operations for each device, for example, by operating a switch that is a device, it is possible to turn on or off the lighting fixture that is the device. In many cases, the association of the interlocking operations is performed within the subsystem, but the association beyond the subsystem is also possible.

  Incidentally, the DC power supply unit 101 basically generates DC power by power conversion of an AC power supply (commercial power system) AC supplied from outside the house like a commercial power supply. In the configuration shown in the figure, the AC power source AC is input to an AC / DC converter 112 including a switching power source through a main circuit breaker (main switch) 111 attached to the distribution board 110 as an internal unit. The DC power output from the AC / DC converter 112 is connected to each DC breaker 114 through the cooperative control unit 113.

  The DC power supply unit 101 is provided with a secondary battery 162 in preparation for a period in which power is not supplied from the AC power supply AC (for example, a power failure period of the commercial power supply AC). It is also possible to use a solar cell 161 or a fuel cell 163 that generates DC power. The solar battery 161, the secondary battery 162, and the fuel battery 163 are distributed power supplies with respect to the main power supply including the AC / DC converter 112 that generates DC power from the AC power supply AC. In the illustrated example, the solar cell 161, the secondary battery 162, and the fuel cell 163 include a circuit unit that controls the output voltage, and the secondary battery 162 includes a circuit unit that controls charging as well as discharging.

  Of the distributed power sources, the solar cell 161 and the fuel cell 163 are not necessarily provided, but the secondary battery 162 is preferably provided. The secondary battery 162 is charged in a timely manner by a main power source or other distributed power source, and the secondary battery 162 is discharged not only in a period in which power is not supplied from the AC power source AC but also in a timely manner as necessary. The coordination control unit 113 performs charge / discharge of the secondary battery 162 and coordination between the main power source and the distributed power source. That is, the cooperative control unit 113 functions as a DC power control unit that controls the distribution of power from the main power source and the distributed power source constituting the DC power supply unit 101 to the DC device 102. Note that a configuration may be adopted in which the outputs of the solar cell 161, the secondary battery 162, and the fuel cell 163 are converted into AC power and used as input power of the AC / DC converter 112.

  Since the driving voltage of the DC device 102 is selected from a plurality of types of voltages depending on the device, a DC / DC converter is provided in the cooperative control unit 113 to convert the DC voltage obtained from the main power source and the distributed power source into a necessary voltage. Is desirable. Normally, one type of voltage is supplied to one subsystem (or DC device 102 connected to one DC breaker 114), but three or more wires are used for one subsystem. A plurality of types of voltages may be supplied. Alternatively, it is possible to adopt a configuration in which the DC supply line Wdc is of a two-wire type and the voltage applied between the lines is changed with time. The DC / DC converter may be provided in a plurality of dispersed manners like the DC breaker.

  In the above configuration example, only one AC / DC converter 112 is illustrated, but a plurality of AC / DC converters 112 can be arranged in parallel, and when a plurality of AC / DC converters 112 are provided. It is desirable to increase or decrease the number of AC / DC converters 112 that are operated according to the magnitude of the load.

  The AC / DC converter 112, the cooperative control unit 113, the DC breaker 114, the solar cell 161, the secondary battery 162, and the fuel cell 163 described above are provided with a communication function, and include a main power source, a distributed power source, and a DC device 102. It is possible to perform cooperative operations that deal with the load status. The communication signal used for this communication is transmitted in the form of being superimposed on the DC voltage in the same manner as the communication signal used for the DC device 2.

  In the above example, the AC / DC converter 112 is arranged in the distribution board 110 in order to convert the AC power output from the main breaker 111 into DC power by the AC / DC converter 112. On the output side, a branch breaker (not shown) provided in the distribution board 110 branches the AC supply line into a plurality of systems, and an AC / DC converter is provided on the AC supply line of each system to convert it into DC power for each system. You may employ | adopt the structure to do.

  In this case, since the DC supply unit 1 can be provided for each floor or room of the house H, the DC supply unit 1 can be managed for each system, and between the DC device 102 that uses DC power. Since the distance of the DC supply line Wdc becomes smaller, it is possible to reduce power loss due to a voltage drop in the DC supply line Wdc. Also, the main breaker 111 and the branch breaker are housed in the distribution board 110, and the AC / DC converter 112, the cooperative control unit 113, the DC breaker 114, and the home server 116 are housed in a separate board from the distribution board 110. Also good.

1A and 1B show an embodiment of the present invention, in which FIG. 1A is a cross-sectional view of a main part in a charged state, and FIG. It is a perspective view of a loading state same as the above. It is a system configuration diagram of a DC power distribution system using the same as above. The conventional circuit breaker for alternating current is shown, (a) is a perspective view of a closing state, (b) is a perspective view of an open state. It is principal part sectional drawing of the open state which shows the same as the above. It is principal part sectional drawing of the injection | throwing-in state which shows the same as the above.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Container 6 Handle 10 Slide operation member 11 Operation part 12 Pressing protrusion (pressing part)
14a Leg piece (pressing part)

Claims (1)

A primary side terminal to which a DC voltage is applied, a secondary side terminal connected to a load, a main contact provided in an electric circuit connecting the primary side terminal and the secondary side terminal, and an opening / closing mechanism for opening and closing the main contact; Tripping means that releases the opening and closing mechanism to release the main contact when overcurrent flows in the electric circuit, and is formed in a box shape with an insulating material, provided with a primary terminal on one end side, and a secondary side on the other end side A terminal is provided between the main contact, the open / close mechanism, and the container housing the tripping means, and the open position where the main contact is opened by the open / close mechanism and the open position where the main contact is opened. A handle provided rotatably, and conversion means for converting the turning motion of the handle protruding from the flat front surface of the body into a sliding motion substantially parallel to the front surface,
The handle has a handle operating portion that does not protrude from the front surface of the container in the closing position and protrudes from the front surface of the container in other than the charging position,
The converting means includes an operation unit that is manually operated to slide, and a pressing unit that rotates the handle with a movement amount larger than the sliding amount of the operation unit when the main contact is opened by applying a pressing force to the handle operation unit. I have a,
The pressing part is composed of a leg piece standing in the protruding direction of the handle and a pressing protrusion protruding from the tip of the leg piece and coming into contact with the operation part of the handle at the closing position, and the pressing protrusion is separated from the front surface of the body. And the leg piece is connected to the sliding contact surface of the pressing projection, and the handle rotates from the closing position toward the opening position. circuit breaker operating portion of the handle is characterized in that it have a sliding surface in sliding contact with the.

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